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How do amino acid mismatches affect the outcome of hematopoietic cell transplants?: a structural perspective

Published: 02 August 2010 Publication History

Abstract

The success of hematopoietic cell transplantation from an unrelated donor depends in part on the degree of Human Histocompatibility Leukocyte Antigen (HLA) matching between donor and patient. We present a structure-based analysis of HLA mismatching, focusing on individual amino acid mismatches and their effect on peptide binding specificity. Using molecular modeling simulations of HLA-peptide interactions, we find evidence that amino acid mismatches predicted to perturb peptide binding specificity are associated with higher risk of mortality in a large and diverse dataset of patient-donor pairs assembled by the International Histocompatibility Working Group in Hematopoietic Cell Transplantation consortium. Although preliminary, this analysis may represent a first step toward sequence-based prediction of relative risk for HLA allele mismatches.

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    cover image ACM Conferences
    BCB '10: Proceedings of the First ACM International Conference on Bioinformatics and Computational Biology
    August 2010
    705 pages
    ISBN:9781450304382
    DOI:10.1145/1854776
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    Published: 02 August 2010

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